// map::emplace
#include <bits/stdc++.h>
using namespace std;
int main ()
{
  map<char,int> mymap;

  mymap.emplace('x',100);
  mymap.emplace('y',200);
  mymap.emplace('z',100);

  cout << "mymap contains:"<<"\n";
  for (auto& x: mymap)
    cout << "[" << x.first << ':' << x.second << ']'<<"\n";
  return 0;
}

